38723831 has 2 divisors, whose sum is σ = 38723832. Its totient is φ = 38723830.

The previous prime is 38723821. The next prime is 38723833. The reversal of 38723831 is 13832783.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38723831 is a prime.

It is a super-2 number, since 2×38723831² = 2999070174633122, which contains 22 as substring.

Together with 38723833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 38723791 and 38723800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38723833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19361915 + 19361916.

It is an arithmetic number, because the mean of its divisors is an integer number (19361916).

Almost surely, 2^38723831 is an apocalyptic number.

38723831 is a deficient number, since it is larger than the sum of its proper divisors (1).

38723831 is an equidigital number, since it uses as much as digits as its factorization.

38723831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 38723831 is about 6222.8474993366. The cubic root of 38723831 is about 338.3187794678.

The spelling of 38723831 in words is "thirty-eight million, seven hundred twenty-three thousand, eight hundred thirty-one".